Product overview
The Xingkai Technology Mini ELRS TX 433mHZ is a remote-control transmitter module built around the open-source ExpressLRS system. Its hardware combines an ESP32 and SX1276 main-control arrangement with an ESP8285 backpack chip. The module uses the JR interface for connection to a remote control, while its default signal input is restricted to Crossfire Serial Data Protocol (CRSF). Integration therefore requires a remote-control module interface capable of supplying CRSF output, alongside the specified 5-12V(2S) input.
The transmitter offers output-power values of 100mW, 250mW, 500mW and 1000mW, with refresh rates of 25Hz, 50Hz, 100Hz and 200Hz. Although the model retains its 433mHZ designation, frequency-band options extend from the listed 360Mhz option through 990Mhz, plus 2.4Ghz. These are optional bands rather than a stated single supplied frequency configuration. OpenTX provides the configuration example: the remote control outputs CRSF signals, and a LUA script controls the ELRS transmitter module.
Specifications
| Specification | Value & conditions |
|---|---|
| Manufacturer and model | Xingkai Technology Mini ELRS TX 433mHZ transmitter module |
| Wireless system basis | Remote-control wireless system based on the open-source ExpressLRS project |
| Frequency band options | 360/400/433/500/530/560/720/750/868/915/950/990Mhz/2.4Ghz optional |
| Output power | 100mW/250mW/500mW/1000mW |
| Refresh rate | 25Hz/50Hz/100Hz/200Hz |
| Input voltage | 5-12V(2S) |
| Control and backpack chips | Main control IC: ESP32+SX1276; backpack chip: ESP8285 |
| Signal protocol | Crossfire Serial Data Protocol (CRSF) input only by defaultDefault configuration; remote-control module interface must support CRSF signal output. |
| Remote-control interface | Requires CRSF signal output at the remote-control module interfaceRemote control uses a JR interface; CRSF signal output is required by the default configuration. |
| Module interface format | JR interfaceRemote control uses a JR interface. |
| Configuration and control | Configure CRSF signal output and use a LUA script to control the ELRS transmitter moduleOpenTX remote-control system example. |
